package test2.experiment1.num1;

public class Practice4_1 {
    public static void main(String[] args) {
        Book.showType();
        Book b = new Book("ISBN 9787302437413", "Java语言程序设计"
            , "清华大学出版社", "郎波");
        b.showInformation();
        System.out.println();
        Newspaper.showType();
        Newspaper n = new Newspaper("CN11-0101", "北京日报");
        n.showInformation();
    }
}
